Calculate Macros in a Recipe

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Recipe Macro Calculator

Ingredient Name
Weight (g)
Protein/100g
Carbs/100g
Fat/100g
TOTAL RECIPE 0 kcal
P: 0g
C: 0g
F: 0g
PER SERVING 0 kcal
P: 0g
C: 0g
F: 0g

How to Calculate Macros in a Recipe

Calculating the nutritional value of a home-cooked meal is essential for anyone tracking their fitness progress, whether the goal is muscle gain or weight loss. Commercial labels only provide data for raw or individual components; a recipe macro calculator bridges the gap for complex dishes like stews, stir-fries, or baked goods.

The 4-4-9 Rule

To determine the total calories, this calculator uses the standard Atwater factors:

  • Protein: 4 calories per gram.
  • Carbohydrates: 4 calories per gram.
  • Fats: 9 calories per gram.

Step-by-Step Example

Imagine you are making a simple Chicken and Rice bowl for two people (2 servings):

  1. Chicken Breast (300g): 100g typically contains 31g Protein, 0g Carbs, and 3.6g Fat.
  2. White Rice (200g): 100g typically contains 2.7g Protein, 28g Carbs, and 0.3g Fat.
  3. Olive Oil (15g): 100g contains 0g Protein, 0g Carbs, and 100g Fat.

By entering these values into the calculator, you'll find the total recipe macros and, more importantly, the specific portion sizes to log in your fitness app. This ensures you aren't underestimating your caloric intake by forgetting "hidden" ingredients like cooking oils or calorie-dense sauces.

Why Precision Matters

Many people fail to reach their goals because they estimate portions "by eye." A tablespoon of peanut butter or oil can vary by 50-100 calories depending on how level the spoon is. Using a digital kitchen scale to get the weight in grams (g) and inputting it here provides the most accurate data for your dietary tracking.

function calculateRecipeMacros() { var servings = parseFloat(document.getElementById('numServings').value); if (!servings || servings <= 0) servings = 1; var totalProtein = 0; var totalCarbs = 0; var totalFat = 0; for (var i = 1; i 0) { totalProtein += (weight / 100) * pPer100; totalCarbs += (weight / 100) * cPer100; totalFat += (weight / 100) * fPer100; } } var totalCalories = (totalProtein * 4) + (totalCarbs * 4) + (totalFat * 9); var serveProtein = totalProtein / servings; var serveCarbs = totalCarbs / servings; var serveFat = totalFat / servings; var serveCalories = totalCalories / servings; // Update Totals document.getElementById('totalCals').innerText = Math.round(totalCalories) + " kcal"; document.getElementById('totalP').innerText = totalProtein.toFixed(1); document.getElementById('totalC').innerText = totalCarbs.toFixed(1); document.getElementById('totalF').innerText = totalFat.toFixed(1); // Update Per Serving document.getElementById('serveCals').innerText = Math.round(serveCalories) + " kcal"; document.getElementById('serveP').innerText = serveProtein.toFixed(1); document.getElementById('serveC').innerText = serveCarbs.toFixed(1); document.getElementById('serveF').innerText = serveFat.toFixed(1); // Show results document.getElementById('resultsArea').style.display = 'grid'; // Smooth scroll to results document.getElementById('resultsArea').scrollIntoView({ behavior: 'smooth', block: 'nearest' }); }

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